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The oil industry is anchoring structures of hundreds of thousands of tons in waterdepth down to 2000m - above are the used solutions...

The cost of the anchor is about 15% of the platform.

A seastead with its less stringent positioning requrements should be fine with spending 7% or much less of the project budget on the anchor.

So the whole idea to "design a project around the anchor solution" is not really a good idea. Anchoring in mid ocean is a "minor cost factor" compared to the cost factor to create the floating platform itself.

The Prelude project ( http://concretesubmarine.activeboard.com/t58944443/prelude-ocean-based-lng-plant/ ) also suggests that anchoring even in conditions of a cyclon category 5 is very feasible with todays anchor technology.

So all the exotic discussion about things like "lazy station keeping" of floating cities, anchoring on a seamount location, etc.ect. are based on "asumption that anchoring in mid ocean is a "mayor challange and unknow frontier" that needs to be solved with innovative ideas  - checking the marine business reality it turns out - it is not.

So i suggest we should stop to discuss about "lazy station keeping" for floating cities, to avoid to shu away investors who want concepts on a "realistic base" we should read up the basics and just come to the conclusion that a seastead will be anchored like anything else in the marine industry with tension anchors and torret mooring. There is not much to discuss about - the discussion is over since the problem was solved to everybodies satisfaction in the seventies.

Exposing the economy of a floating city to a uncertain location is not a good idea.

Floating cities will work like Venice ( Historical example Venice: http://concretesubmarine.activeboard.com/t56710025/venice-italy-how-to-do-instructions-for-seasteading-from-his/ ) which is strongly locked into the grid of marine trade - and far from being far out and disconnected, it works like a marine hub. Wandering over the oceans like the "Flying Dutchman" will not go well with that function.

So destroying the economic potential to save on anchor cable which is a minor cost factor is not a smart approach.

1. Deep Sea Anchors - Innovative anchor solutions

   www.deepseaanchors.com/‎

   A cost effective solution insensitive to water depth. Deep Sea Anchors AS is a provider of innovative anchor solutions for offshore floating structures especially in ...

2. LOGO - Deep Sea Anchors - Innovative anchor solutions

   www.deepseaanchors.com/mobile.aspx?contactInfo...pageid...‎

   Deep Sea Anchors AS is a technology developer and provider of innovative anchor solutions for offshore floating structures especially in soft seabed sediments.

3. Dynamically installed anchors for floating offshore structures /

   repository.uwa.edu.au/dtl_publish/Theses/3/10597.html‎

   Dynamically installed anchors have been proposed as a cost-effective anchoring solution for floating offshore structures in deep water environments. The rocket ...
4. [PDF]

   Anchors for floating structures (Murff 2005) - Civilphd.com

   civilphd.com/.../Anchors%20for%20floating%20structures%20(Murff%...‎

   Floating structures that are moored impose a variety of load conditions on the anchor .... the closed form solution to the anchor line equations shown here.

5. "Torpedo Anchors" - NGI

   www.ngi.no/...structures/.../Torpedo-Anchors---A-new-anchor-technolo...‎

   Torpedo shaped anchors may be the next cost-effective and robust anchor solution for offshore floating structures. These anchors are designed such that after ...

6. Torpedo anchors - NGI

   www.ngi.no/en/About-NGI/VP09/RnD-activity/Torpedo-anchors/‎

   Anchors formed like torpedoes can become the next cost-effective and robust anchor solution for floating structures in deep water down to 3000 metres depth.
7. [PDF]

   New Innovative Anchor Solution for Deepwater Mooring ... - CCOP

   www.ccop.or.th/...2011.../Paper06_JonToreLieng_DeepSeaAchors.pdf‎

   Jan 26, 2011 - Technology developer and provider of innovative anchor solutions for floating structures. •. Expertise in marine soil mechanics. •. Located in ...

8. Billy Bergeron on discovering mooring systems solutions for floating ...

   www.epmag.com/.../Billy-Bergeron-discovering-mooring-systems-soluti...‎

   May 1, 2010 - ... environment, and mooring systems for floating structures are critical to ... Determined to become an anchor handler, he began mooring rigs ...

9. JLD Marine Anchor, ecological mooring solution - YouTube

   ► 0:55► 0:55

   www.youtube.com/watch?v=urlJ5lo5cQc‎

   Feb 1, 2012 - Uploaded by JLDInternational

   JLD Marine Anchors, the ecological mooring solution. ... Anchors secure pontoons, buoys, moorings ...
10. More videos for anchor solutions for floating structures »
11. [PDF]

    Deep Penetrating Anchor - NLI

    www.nli.no/filer/DeepSeaAnchorsProduktarkweb.pdf‎

    Innovative anchor solutions. Deep Penetrating Anchor. What we do. Deep Sea Anchors provides anchor solutions for mooring of offshore floating structures in ...